ISO weeks in a year
List all ISO weeks in a year.
Enter a year to get the full list of its ISO weeks, with the start and end dates of each week.
Year to analyze
Result
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- ISO year
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- First week
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- Last week
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| Week | From | To |
|---|
Quick explanation
Enter a year. The tool automatically calculates whether the ISO year has 52 or 53 weeks, then displays each week with its start and end date. The result can be copied or downloaded as a text file.
Try this too
Need to find the week for a date?
Use the Week number tool to quickly find the ISO week matching a specific date.
Additional information
List the ISO weeks of a year
This tool displays all ISO weeks for a given year. Each row shows the week number, its start date and its end date.
Under the ISO system, weeks start on Monday and the first week of the year is the one containing the first Thursday of the year.
Years with 52 or 53 weeks
An ISO year usually has 52 weeks, but some years have 53. The tool detects this automatically and displays the corresponding full list.
This can be useful when preparing a yearly schedule, checking a professional calendar or identifying weeks that overlap the beginning or end of a year.
Copy or download the list
The week list can be copied to the clipboard or downloaded as a text file.
The file contains the ISO year, the number of weeks and the details of each week with its start and end dates.
Limits and reuse
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